first commit

app/api/stats/route.ts

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+import { NextResponse } from "next/server";
+import { getDatabase } from "@/lib/db/mongodb";
+
+export async function GET() {
+  try {
+    const db = await getDatabase();
+
+    // Récupérer toutes les transactions
+    const transactions = await db.collection("transactions").find({}).toArray();
+
+    // Calculer les tokens par jour (7 derniers jours)
+    const dailyStats = [];
+    const today = new Date();
+    const dayNames = ["Dim", "Lun", "Mar", "Mer", "Jeu", "Ven", "Sam"];
+    
+    for (let i = 6; i >= 0; i--) {
+      const date = new Date(today);
+      date.setDate(date.getDate() - i);
+      date.setHours(0, 0, 0, 0);
+      
+      const nextDate = new Date(date);
+      nextDate.setDate(nextDate.getDate() + 1);
+      
+      const dayTransactions = transactions.filter(transaction => {
+        const transactionDate = new Date(transaction.createdAt);
+        return transactionDate >= date && transactionDate < nextDate;
+      });
+      
+      const totalTokens = dayTransactions.reduce((sum, transaction) => {
+        return sum + Math.abs(Number(transaction.rawAmount) || 0);
+      }, 0);
+      
+      dailyStats.push({
+        name: dayNames[date.getDay()],
+        value: totalTokens
+      });
+    }
+
+    // Calculer la répartition par modèle (vraies données)
+    const modelStats = new Map<string, number>();
+    
+    transactions.forEach(transaction => {
+      const model = transaction.model || "Inconnu";
+      const tokens = Math.abs(Number(transaction.rawAmount) || 0);
+      modelStats.set(model, (modelStats.get(model) || 0) + tokens);
+    });
+
+    // Convertir en array et trier par usage
+    const modelData = Array.from(modelStats.entries())
+      .map(([name, value]) => ({ name, value }))
+      .sort((a, b) => b.value - a.value);
+
+    return NextResponse.json({
+      dailyTokens: dailyStats,
+      modelDistribution: modelData
+    });
+  } catch (error) {
+    console.error("Erreur lors du calcul des statistiques:", error);
+    return NextResponse.json({ error: "Erreur serveur" }, { status: 500 });
+  }
+}